- 行业: Weather
- Number of terms: 60695
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
A local name for a severe snowstorm with a strong squally wind that occurs in the Andes Mountain passes of northern Peru.
Industry:Weather
A location where meteorological observations such as surface, upper air, and climatological observations are taken. In a general sense, the term also includes service offices that prepare weather maps and charts, issue forecasts and warnings, issue weather briefings to pilots, and prepare and disseminate climatological information.
Industry:Weather
A line or narrow zone along which there is an abrupt change of wind direction. See Also surge line.
Industry:Weather
A line along which pressures are lower than in the surroundings and where the cyclonic curvature of the isobars is a maximum.
Industry:Weather
A line along which an infinite vorticity in a fluid motion is concentrated, the surrounding fluid being free of vorticity. In an autobarotropic frictionless fluid, a vortex line always consists of the same fluid particles; the vortex filament is, thus, a vortex line and is the limiting case of a vortex tube as the cross- sectional area of the tube shrinks to zero.
Industry:Weather
A layer in which temperature increases with altitude. The principal characteristic of an inversion layer is its marked static stability, so that very little turbulent exchange can occur within it. Strong wind shears often occur across inversion layers, and abrupt changes in concentrations of atmospheric particulates and atmospheric water vapor may be encountered on ascending through the inversion. When an inversion is mentioned in meteorological literature and discussion, a temperature inversion is usually meant. See frontal inversion, subsidence inversion, trade-wind inversion.
Industry:Weather
A hygrometer in which the rotation of the hygrometric element is a function of the humidity. Such hygrometers are constructed by taking a substance in which length is a function of the humidity and twisting or spiraling it under tension in such a manner that a change in length will cause a further rotation of the element. See hygroscope.
Industry:Weather
A hydrometeorological message issued to provide appropriate advance notice that meteorological conditions exist in which hazardous and potentially life-threatening weather conditions may develop. Examples include tornado watches, severe thunderstorm watches, flood and flash flood watches, fire weather watches, and winter storm watches. See Also watch.
Industry:Weather
